This product is anemergency release lock. It is made of solid materials. It is safe and durable. It can serve you for a long time without being easily damaged. It is an excellent emergency release lock that can bring you more convenience, allowing you to have a more comfortable experience. Features -Color: , Random Color Lock Cylinder-Material:Steel wire, metal-Size:5.50X5.50X4.00cm/2.16X2.16X1.57in- This door lock allows manual opening of the garage door in the event of a power failure or other opener failure.- This garage door emergency release lock is universally compatible with most brands of garage door openers.- Made of die-cast construction, brushed steel wire and metal for durability.- Widely used in bank, hotel, store, school, home, mall, and etc.- Simple installation, easy to use for beginner or professional, allow you to use in an orderly and stable way.Packing list: 1 x quick release lock2 x keys Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!